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Axial skeleton shark
Question | Answer |
---|---|
neural spine | dorsal projection that terminates the caudal vertebrae |
neural arch | arch that extends dorsally from the centrum to cradle the spinal column in the caudal vertebrae. it also exists in the trunk vertebrae but does not terminate in a neural spine. |
centrum | major point of articulation between the body of the vertebrae |
neural canal | the canal in the vertebrae through which the spinal cord runs |
Interneural (intercalary) plate | Dorsal intercalary plates form a continuous roof over the spinal cord and the ventral intercalary plates occur between basapophyses which articulate with the ribs |
hemal arch | extends ventrally from the centrum |
hemal spine | terminates the hemal arch under the centrum |
notochord | exists as a thin central strand in the centrum and gelatinous masses between adjacent vertebrae due to the constriction by vertebral cartilages during develpment |